From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3A183C43381 for ; Tue, 12 Mar 2019 17:58:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0465C205C9 for ; Tue, 12 Mar 2019 17:58:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552413505; bh=PV18HEirU5NtI+UTocHR1iBT+UGQDa2j60gIi+fZQZ0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ev7kzpSBO7cyNh1zqpQ2tYv2IgKfN+qXQQH9xart6+v7qwHDgN5E5lxqGn/svoXgJ M231AznWD8wkRlVEPxPANJb7nb/FIV4xCNS3sNk7Ihee+/a2ZLaLyjvUkCo/bICJRm YvaalencIyuIkkFgcPSUS4pesAAlSqMPSB5QEtvc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728531AbfCLR6X (ORCPT ); Tue, 12 Mar 2019 13:58:23 -0400 Received: from mail.kernel.org ([198.145.29.99]:51052 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727525AbfCLRNl (ORCPT ); Tue, 12 Mar 2019 13:13:41 -0400 Received: from localhost (unknown [104.133.8.98]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E115D21872; Tue, 12 Mar 2019 17:13:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552410821; bh=PV18HEirU5NtI+UTocHR1iBT+UGQDa2j60gIi+fZQZ0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QpEfTS/Q7LuhHR/WhqlmLdeymLKaHyIV8I5tyqJyICi1Trxu5FQLIh/DiUAcL3MKV QUTg/52OzWxmc9fWLDx8FFt6X4ZdRSrxLTjUPdUtnh2xSs/syU429rpBqMm/4GqOi3 yqoGR1DDpS4cRUgO9WIpjoC+BgR+qFvHx+Ye9ZIU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jan Kiszka , Ulf Hansson , Michal Simek Subject: [PATCH 4.20 154/171] arm64: dts: zcu100-revC: Give wifi some time after power-on Date: Tue, 12 Mar 2019 10:08:54 -0700 Message-Id: <20190312170400.768888216@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190312170347.868927101@linuxfoundation.org> References: <20190312170347.868927101@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.20-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jan Kiszka commit 35a4f89cd4731ac6ec985cd29ddc1630903006b7 upstream. Somewhere along recent changes to power control of the wl1831, power-on became very unreliable on the Ultra96, failing like this: wl1271_sdio: probe of mmc2:0001:1 failed with error -16 wl1271_sdio: probe of mmc2:0001:2 failed with error -16 After playing with some dt parameters and comparing to other users of this chip, it turned out we need some power-on delay to make things stable again. In contrast to those other users which define 200 ms, Ultra96 is already happy with 10 ms. Fixes: 5869ba0653b9 ("arm64: zynqmp: Add support for Xilinx zcu100-revC") Signed-off-by: Jan Kiszka Acked-by: Ulf Hansson Signed-off-by: Michal Simek Signed-off-by: Greg Kroah-Hartman --- arch/arm64/boot/dts/xilinx/zynqmp-zcu100-revC.dts | 1 + 1 file changed, 1 insertion(+) --- a/arch/arm64/boot/dts/xilinx/zynqmp-zcu100-revC.dts +++ b/arch/arm64/boot/dts/xilinx/zynqmp-zcu100-revC.dts @@ -101,6 +101,7 @@ sdio_pwrseq: sdio_pwrseq { compatible = "mmc-pwrseq-simple"; reset-gpios = <&gpio 7 GPIO_ACTIVE_LOW>; /* WIFI_EN */ + post-power-on-delay-ms = <10>; }; };